docs(D.2b): widget-generalization implementation plan
8-task TDD plan: chat golden fixture + resolved-Type conformance (Task 1,
empirically resolves the input's Type), then one-widget-per-commit migration —
UiScrollbar(11), UiButton(1), UiMenu(6), UiText(12)+the Type-12 flip,
UiField(3) — then thin the controller (Task 7, visual gate) and the gated
vitals UiText rewire (Task 8). Each task: failing test, register in the
factory switch, controller find-by-id binding, build+test green, commit.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
34e79096f3